Color calibrator



FIG. 1 is a left-front perspective view of a color calibrator showing the new design;

FIG. 2 is a front view thereof

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a right side view thereof.

The left side is not shown but is a mirror image of the right side shown in FIG. 5. 

The ornamental design for a color calibrator, as shown and described. 